Lovesick - whats the cure?

I found out my wife of 20 years was screwing around early January '05.By june I had the degree nisi,final part of divorce.Tho I gave the tears up about this time last year,she still in my mind ,sometimes.The only times she is out of my system is when I am with someone else.Forgeting is never easy but life HAS to go on and yes,eventualy it will happen.A new love is the best medicine.Good luck.